Flexible core for casting



T. SHEHAN, Flexible Core for Casting.

Patented Jan. 27,1880.

WlTNESSES ATTORNEY NTTED STATES PATENT OFFICE.

THOMAS SHEHAN, OF CLEVELAND, OHIO.

FLExlBLE CORE FoRoAsTlNe.

SIIEECIFIGA'IIONA formingpart of Letters Patent No. 223,820, dated January 27, 1880.

' Application filed December 10, 1879.

11o all whom 'it may concern:

Be it known that I, THoMAs SHEHAN, of Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Mechanism for Casting Curved Metal Pipe; and I do hereby declare the following to be a full, clear, and eX- act description of the invention, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings, which form part of this speciiication.

My invention relates to a device for casting curved metal pipe, and is especially adapted for the construction of lead-pipe `joints, goosenecks, curves, Sac.; and it consists of a flexible springor elastic core, made in sections, and so connected as to be held in proper position and relation to each oth'er by the action of a retaining-spring, which will also permit the component sections ofsaid core being so shaped in their relation to each other as that the entire core shall be straight, or substantially so, either in part or as a whole, thus enabling it to be readily withdrawn from the casting after the metal has cooled and set without injury either to the casting or core, after which removal the spring shall operate to restore the component sections of the core to their original and proper position for reintroduction into the mold to be employed for a subsequent casting.

In the drawings, Figure l represents, partly in longitudinal section and partly in elevation, a mold and cores, according to my invention, for casting substantially such a device as the sewer-trap shown and described in Letters y Patent No. 194,070, granted to B. P. Bower,

.to correspond with the thread B3.

B2 are'dowelsections B', and engaging in opposite recesses of neighboring joints to accomplish the wellk'nown office ot' dowel-pins, to wit, to hold in proper position and prevent from lateral displacement the various joints when brought together.

C is a continuous iiexible line or chain passing freely through all the sections B excepting the last one, to which it is connected in any suitable manner. The other end of this chain passes freely through the straight portion of the core B, and is attached to the bar C or its equivalent.

It will be apparent that, as the bar C is moved in a direction into or out of the cavity of the cone in which itis placed, it will alternately permit the sections B to arrange themselves more or less into a straight line with thestraight portion of the core, or draw them into close contact with each other, thus compelling them collectively to describeY such a curve as shown in the drawings, or any other 'curve that might be determined by the peculiar conformation ofthe component sections B.

A continuation of the core B (shown in the drawings at B3) is made to extend outside of and beyond the'mold A. This portion is provided with a male screw-thread, with which engages the collar B4, having a female screw This collar B4 is provided with handles or any other suitable device whereby it `may be conveniently manipulated, for purposes which will hereinafter appear.

C2 is a spring, the operation of which is to drive bar C' in a direction out from the core part b', however, may have, if desired, the surface of a plain straight cylinder corresponding to the straight portion of the core, instead of being curved, as above mentioned. The portion b enters and revolves within the lower IOC end of the straight portion of the core. rIhis construction permits a free rotation of the straight portion of the core and all its attached parts, without any liability to disturbance of of any other portion of the core. Moreover, it allows of sufcient longitudinal stretching or elongation of the core without detriment to the position or operation of the curved portion thereof.

The operation of my device is as follows: The parts having been arranged and adjusted substantially as shown in Fig. l of the drawings, or in any other relation suitable to the product to be cast, the metal is poured between the wall of the mold A and the core B. When sufciently cooled and set Vthe core B is withdrawn from the casting and the casting removed from the mold.

The operation of Withdrawingthe core B may either be accomplished by a direct manual pull upon its projecting portion B3, or the collar Bl may be screwed down in such a manner upon the casting or the mold A as will in an obvious manner operate to straighten and withdraw the core B, after which the core is replaced in the mold, and everything is ready for a subsequent casting. In case of lead casting this operation may be repeated very rapidly, the mold and core being both composed of metal and the lead rapidly cooling and setting. y

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. The combination, with a curved mold and a tubular core having a portion thereof formed with rin g-sections, of a iiexible device secured to the latter, and adapted to adjust them in or out of line with the rigid portion of the core, y

substantially as set forth.

2. The combination, with a curved mold, a

vtubular core having a portion thereof formed with rin g-sections, and fastening devices which secure the latter together, of a fiexible device secured to said sections and adapted to adjust them in or out of line with the rigid portion of the core, substantially as set forth.

3. The combination, with a curved mold, a tubular core having a portion thereof1 formed with rin g-sections, and fastening devices which connect the latter together, of a flexible device secured to said sections at one extremity and connected to a rod at its opposite extremity, said rod passin g through the rigid portion ofthe core and adapted to communicate force to said flexible device in adjusting the ring-sections in or out of line with the rigid portion of the die, substantially as set forth.

4. The combination, with a curved mold, a tubular core having a portion thereof formed with ring-sections, and doWel-pins connecting the latter together, of a flexible device having one extremity secured to the last ring-section and the opposite extremity s ecured to a rod Which passes through the rigid portion of the core, substantially as set forth.

5. jlhe combination, with a curved mold and a tubular core having a portion thereof formed With ring-sections, of a chain having one eX- tremity secured to the last section and its opposite extremity secured to a rod which passes through therigid portion of the core, together with a spring which actuates said rod in drawing out the chain, and thereby forcing the ringsections out of line with the rigid portion of the core, substantially as set forth.

6. ln a tubular core, the combination, with the rigid portion, of a iieXible portion com posed of ring-sections, and an intermediate tube, said tube being formed with a straight portion which fits in the rigid portion of the core, and provided with an enlarged projecting end which connects With the ring-sections, substantially as set forth.

7. The combination of sections B, dewelpins B2, chain or line C, bar C?, and spring O2, substantially as and for the purposes shown.

8. In combination with the core B, the projecting portion B3 and the collar B4, substantially as and for the purposes shown.

ln testimony whereof I have signed my name'to this specitication in the pres/ence of two subscribing witnesses.

THOMAS SHEHAN.

Witnesses:

JNO. CRoWELL, J r., WILLARD FRAGKER. 

